Hi doctor! I am 20 years old female. I am having cold and throat pain. So my mom gave me abbcott erythrocin-500 tablet for my throat pain. I took it for mrng and night. Since now I have taken it only 2 times. But each time I take the tablet. After 3-4 hrs I get back pain. My right back pains. I do not know why. Pls help.

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